(Newser)
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Following a similar investigation in Canada last month, the Justice Department has launched a probe into possible price-fixing in the US chocolate industry. The suspects form a rich, creamy lineup: M&M maker Mars acknowledged it has been contacted by the DOJ, the Wall Street Journal reports. Nestle, too, says it is aware of the investigation but has not yet been contacted. Other makers declined comment.

Canadian authorities, meanwhile, are looking into the Canadian divisions of Hershey, Cadbury, Mars, and Nestle. Recent increases in dairy costs have driven up the price of sweets, a source of consternation for major chocolatiers. The scope of the investigation remains unclear, and whether it turns into a criminal investigation depends on what dark, milky secrets it uncovers.